I am having an issue while upgrading from rails 2.3.10 to rails 3
I am upgrading an existing project, what I did is create a brand new rails 3.0.9 project copy over the code (models, views etc...) and changing the things that the rails_upgrade plugin recommended.

Also, I upgraded the gems etc..

Now, when I try to start the server I have this issue:

/Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/actionpack-3.0.9/lib/abstract_controller/helpers.rb:123:in `include': wrong argument type Class (expected Module) (TypeError)
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/actionpack-3.0.9/lib/abstract_controller/helpers.rb:123:in `add_template_helper'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/actionpack-3.0.9/lib/abstract_controller/helpers.rb:123:in `module_eval'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/actionpack-3.0.9/lib/abstract_controller/helpers.rb:123:in `add_template_helper'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/actionpack-3.0.9/lib/abstract_controller/helpers.rb:98:in `helper'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/actionpack-3.0.9/lib/abstract_controller/helpers.rb:97:in `each'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/actionpack-3.0.9/lib/abstract_controller/helpers.rb:97:in `helper'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/actionpack-3.0.9/lib/action_controller/base.rb:228:in `inherited'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/bundler/gems/typus-974c0c36221d/app/controllers/admin/base_controller.rb:1
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:239:in `require'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:239:in `require'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:227:in `load_dependency'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:239:in `require'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:346:in `require_or_load'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:491:in `load_missing_constant'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:183:in `const_missing'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:181:in `each'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:181:in `const_missing'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/bundler/gems/typus-974c0c36221d/app/controllers/admin/account_controller.rb:1
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:239:in `require'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:239:in `require'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:227:in `load_dependency'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:239:in `require'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:346:in `require_or_load'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:300:in `depend_on'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:216:in `require_dependency'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/engine.rb:138:in `eager_load!'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/engine.rb:137:in `each'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/engine.rb:137:in `eager_load!'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/engine.rb:135:in `each'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/engine.rb:135:in `eager_load!'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/application.rb:209:in `to_proc'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/application/railties.rb:11:in `each'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/application/railties.rb:11:in `all'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/application.rb:107:in `eager_load!'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/application/finisher.rb:41
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/initializable.rb:25:in `instance_exec'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/initializable.rb:25:in `run'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/initializable.rb:50:in `run_initializers'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/initializable.rb:49:in `each'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/initializable.rb:49:in `run_initializers'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/application.rb:134:in `initialize!'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/application.rb:77:in `send'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/application.rb:77:in `method_missing'
from /Users/avitzurel/Dropbox/Projects/gogobot_rails3/config/environment.rb:5
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:239:in `require'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:239:in `require'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:225:in `load_dependency'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:596:in `new_constants_in'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:225:in `load_dependency'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:239:in `require'
from /Users/avitzurel/Dropbox/Projects/gogobot_rails3/config.ru:3
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/rack-1.2.3/lib/rack/builder.rb:46:in `instance_eval'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/rack-1.2.3/lib/rack/builder.rb:46:in `initialize'
from /Users/avitzurel/Dropbox/Projects/gogobot_rails3/config.ru:1:in `new'
from /Users/avitzurel/Dropbox/Projects/gogobot_rails3/config.ru:1

I am struggling with this one for a few hours now and I would love an answer.

Thanks.

EDIT:
This is the stacktrace after I removed typus completely:

/Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/actionpack-3.0.9/lib/abstract_controller/helpers.rb:123:in `include': wrong argument type Class (expected Module) (TypeError)
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/actionpack-3.0.9/lib/abstract_controller/helpers.rb:123:in `add_template_helper'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/actionpack-3.0.9/lib/abstract_controller/helpers.rb:123:in `module_eval'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/actionpack-3.0.9/lib/abstract_controller/helpers.rb:123:in `add_template_helper'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/actionpack-3.0.9/lib/abstract_controller/helpers.rb:98:in `helper'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/actionpack-3.0.9/lib/abstract_controller/helpers.rb:97:in `each'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/actionpack-3.0.9/lib/abstract_controller/helpers.rb:97:in `helper'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/actionpack-3.0.9/lib/action_controller/base.rb:228:in `inherited'
from /Users/avitzurel/Dropbox/Projects/gogobot_rails3/app/controllers/application_controller.rb:1
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:239:in `require'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:239:in `require'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:227:in `load_dependency'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:239:in `require'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:346:in `require_or_load'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:491:in `load_missing_constant'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:183:in `const_missing'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:181:in `each'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:181:in `const_missing'
from /Users/avitzurel/Dropbox/Projects/gogobot_rails3/app/controllers/abuse_reports_controller.rb:1
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:239:in `require'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:239:in `require'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:227:in `load_dependency'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:239:in `require'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:346:in `require_or_load'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:300:in `depend_on'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:216:in `require_dependency'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/engine.rb:138:in `eager_load!'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/engine.rb:137:in `each'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/engine.rb:137:in `eager_load!'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/engine.rb:135:in `each'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/engine.rb:135:in `eager_load!'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/application.rb:108:in `eager_load!'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/application/finisher.rb:41
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/initializable.rb:25:in `instance_exec'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/initializable.rb:25:in `run'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/initializable.rb:50:in `run_initializers'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/initializable.rb:49:in `each'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/initializable.rb:49:in `run_initializers'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/application.rb:134:in `initialize!'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/application.rb:77:in `send'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/railties-3.0.9/lib/rails/application.rb:77:in `method_missing'
from /Users/avitzurel/Dropbox/Projects/gogobot_rails3/config/environment.rb:5
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:239:in `require'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:239:in `require'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:225:in `load_dependency'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:596:in `new_constants_in'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:225:in `load_dependency'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/activesupport-3.0.9/lib/active_support/dependencies.rb:239:in `require'
from /Users/avitzurel/Dropbox/Projects/gogobot_rails3/config.ru:3
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/rack-1.2.3/lib/rack/builder.rb:46:in `instance_eval'
from /Users/avitzurel/.rvm/gems/ruby-1.8.7-p334@gogo_web/gems/rack-1.2.3/lib/rack/builder.rb:46:in `initialize'
from /Users/avitzurel/Dropbox/Projects/gogobot_rails3/config.ru:1:in `new'
from /Users/avitzurel/Dropbox/Projects/gogobot_rails3/config.ru:1

what I did was to edit this file helpers.rb:123:in `include' (where the problem was in rails)
I just output the module name which is currently loading, turns out that one the the files in the app/helpers folder was a class (someone put it there months ago).